Ionic Compounds (Edexcel GCSE Chemistry Combined Science): Flashcards

Transfer of electrons from metal to non-metal

Positive sodium ion (Na⁺)

Negative chloride ion (Cl⁻)

Strong electrostatic attraction between opposite charges

No charge (positive & negative cancel out)

Giant structure of ions in regular, repeating pattern

Strong electrostatic forces between oppositely charged ions

$1.2 \times 10^{18}$ ions

High (solid at room temperature)

Strong electrostatic forces need lots of energy to overcome

Higher charges create stronger forces, higher melting point

$\text{Mg}^{2+}$ and $\text{O}^{2-}$ bonds stronger than $\text{Na}^+$ and $\text{Cl}^-$

When melted or dissolved in water

Ions held in fixed positions, can't move

Ions free to move and carry electric current